lib/hysteresis_st.txt
author Edouard Tisserant
Fri, 01 Apr 2011 11:10:06 +0200
changeset 256 101c7f148b9a
parent 192 c6c2a3d487ac
child 276 1679f514f38a
permissions -rwxr-xr-x
Changed packing declaration in iec_types
192
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     1
FUNCTION_BLOCK HYSTERESIS
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     2
    (* Boolean hysteresis on difference *)
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     3
    (* of REAL inputs, XIN1 - XIN2      *)
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     4
  VAR_INPUT XIN1, XIN2, EPS : REAL; END_VAR
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     5
  VAR_OUTPUT Q : BOOL := 0; END_VAR
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     6
  IF Q THEN IF XIN1 < (XIN2 - EPS) THEN Q := 0; END_IF ;
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     7
  ELSIF XIN1 > (XIN2 + EPS) THEN Q := 1 ;
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     8
  END_IF ;
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
     9
END_FUNCTION_BLOCK
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset
    10